Pacelli, Eugenio to Gasparri, Pietro from 18 April 1921, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 11295, URL: www.pacelli-edition.de/en/Document/11295. Last access: 17-07-2024.Online since 14-05-2013.